C # database screening for peace and will be showed on the textbox
The database

Operation window


Select operation window of time and the order number, database search and summation, and will return to the total amount for the payment of the textbox control

CodePudding user response:

Don't know you what database, database, speaking, reading and writing in pseudo code, assumptions used

Int result=MyQuery (" select sum (num * (price + vipprice)) from test1 where id=1 ");
Textbox1. Text=result. The ToString ();